ANPR LUMO | installation guide
A ROI polygon can have an arbitrary number of contour points, but it must contain at least 3 points. The corners of the
polygon are marked as small yellow circles with the area number inscribed (see screenshot above). The shape of the
polygon can be modified as follows:
Reshape the ROI by selecting one of the polygon points and dragging it to the desired location.
Add more points by double clicking on an existing point, this will create a new point. You can then drag the point
to a new image location.
Remove a polygon point by right clicking on it.
Additionally, more than one region of interest can be defined by writing the number of desired regions in the Area
Count field.
More than one region of interest can be defined by setting the number of desired regions in the Number of Areas box.
You can also provide a custom name for an area which can be used in Actions as reference to this ROI.
The example below shows a definition of two ROIs. Note that the small images are actual live images from the camera.
The areas have been given the names Entry Lane, and Exit Lane respectively.
ANPR Region Of Interest with Direction
An region of interest may be combined with a motion filter so that license plates are only accepted if they move in
certain directions.
You can choose the type of motion filter with the pull down dialog next to Motion Matching:
Disabled No motion filtering is used. Any license plate within the area is accepted.
Direction Angle A license plate must move in a defined direction in order to be accepted.
Directions are visualized as green/red sectors - green sections mark the accepted driving
direction, red sections define invalid directions.
In the example below, a direction from top left to bottom right of the image with an angle
range of approx. 90 degrees is defined.
Distance Change A license plate must either approach the camera, or leave the camera in order to be
accepted. The direction estimation is based on the size change of the license plate between
readings.
Note : Distance Change would fit most situation, use Direction Angle for more complex situations
To Next Page
Loading...
Need help?
General